分散染料微胶囊化的工艺研究

研究原位聚合法制备分散染料微胶囊的工艺过程和方法。采用尿素和甲醛为壁材,分散染料为囊心,采用SEM以及Zeta电位仪,观察了分析微胶囊的结构以及分散性,确定了生产微胶囊的最佳工艺条件。     

分散染料微胶囊的释放性能研究

本文主要研究了乳化剂用量、乳化速度、乳化时间和保护胶体的用量对分散染料微胶囊释放性能的影响．结果表明，提高乳化剂的用量、乳化速度和乳化时间，使分散染料微胶囊的释放速率提高；而增加保护胶体PVA的用量，分散染料微胶囊的释放速率下降。     

不同分散染料微胶囊的制备及应用

采用原位聚合法进行双层造壁，对不同结构的分散染料进行胶囊化。将分散染料高速均化后，在pH=4～6时加入TMM，65℃保温1．5小时，再滴加一定量PEHMM，在75℃时保温2.5小时进行双层造壁、C.I.分散橙30染料胶囊的粒径平均值为13．53μm，中值8．732μm；C.I．分散蓝56微胶囊粒径平均值为36.3μm，中值24.87μm。胶囊染色结果显示：这两只染料性能优于传统染料，染色后其废液的吸光度分别为0.021和0.003，比传统染色废水的1.286和0.786低很多。     

分散染料微胶囊的制备及其性能研究

该文利用界面聚合法制备分散染料微胶囊.液化MDI作为壁材单体,聚醚2040用作乳化剂,聚乙烯醇(PVA)作为保护胶体,二月桂酸二丁基锡用作催化剂.主要讨论了不同相比和芯壁比对分散染料微胶囊的粒径、壁厚、释放速率和渗透性常数等的影响.     

彩色发泡微胶囊的制备及分散染料的增塑作用研究

研究了利用原位着色法制备彩色发泡微胶囊的工艺备件,通过有限凝聚法合成发泡微胶囊,添加偶氮类和蒽醌类分散染料,使微胶囊发泡性能和彩色效果显著提高,显著降低发泡温度。     

分散染料微胶囊染色动力学

为了探索分散染料微胶囊在涤纶无助剂高温高压染色过程中的动力学行为,文中采用分散染料微胶囊、纯分散染料和商品分散染料,通过薄膜卷层法测定染料的扩散系数及扩散速率;通过建立染色动力学模型,研究分散染料微胶囊在涤纶无助荆高温高压染色的染色速率常数、平衡上染量及半染时间。结果表明：对染料进行微胶囊化并没有改变分散染料的扩散系数、扩散速率,但改变了染色速率常数及半染时间。     

尿醛树脂微胶囊缓释性研究

对微胶囊的控制释放机理进行了初步探讨,详细讨论了不同工艺条件下制备的尿醛树脂微胶囊的囊心随时间的缓释曲线,并通过平均粒径,膜厚,表观扩散系数等相关参数揭示了不同因素对微胶囊释放速率的影响规律。     

分散染料微胶囊的制备及其在锦纶染色浴中缓释性能研究

采用原位聚合法制备芯壁比1∶3、不同粒径及分布的系列分散染料微胶囊。采用激光粒径分析仪和SEM表征分散染料微胶囊的粒径分布及外形,通过DatacolorSF600PlusCT分光测色仪测定染色锦纶织物的表面色深度即K/S值表征微胶囊的缓释性能。实验结果表明:相同芯壁比,平均粒径越小、分布越窄的胶囊缓释性较强,pH值对胶囊缓释性影响较小。微胶囊对锦纶染色选择在130℃、40min、pH值在6￣7下染色,可达无助剂、无污染染色。     

分散染料微胶囊多次转移印花效果初探

分散染料被微胶囊化后,在不同的转印温度、转印时间、转印浓度下,对纯涤织物进行多次转移印花。通过测色仪测定织物的Ｋ／Ｓ值发现：分散染料微胶囊进行转印的次数在适当条件下可达１０次以上,且其Ｋ／Ｓ值可基本保持不变;不同的转印条件对胶囊化染料的转印效果有较大影响。     

壳聚糖包裹广藿香精油微胶囊的制备及表征

采用复合凝聚法,以广藿香精油为芯材,壳聚糖（CTS）和阿拉伯胶（GA）为壁材,制备了广藿香精油微胶囊。采用扫描电子显微镜（SEM）、激光粒度仪、傅里叶红外光谱（FT-IR）等对微胶囊进行表征。结果表明,当乳化剂用量为质量分数1%,芯壁质量比为1∶2,乳化转速为2 500r/min,复凝pH为5,固化剂用量为1.5g时,微胶囊包封率和载药量最佳,微胶囊球形规则、分散性好,平均粒径为10.5μm。     

原位聚合法制备分散染料微胶囊

以尿素和甲醛为壁材,分散染料酸性红GP(C.I.266)为囊芯制备了分散染料微胶囊。用SEM和Zeta激光粒度测定仪观察分析微胶囊的粒径分布,讨论了反应条件对微胶囊粒径分布的影响。通过实验,提出了制备该分散染料微胶囊的最佳反应条件为:壁材n(尿素)∶n(甲醛)=2∶3,分散剂阿拉伯树胶质量分数为5%,m(芯材)∶m(壁材)∶m(分散剂)=1∶7 25∶2 5,在pH=3,80℃和搅拌速率为1500r/min的体系中反应2h。     

分散染料的近期进展

介绍了分散料的近期进展,包括原有涂纶织物着色用散染料,超细旦纤维用分散染料,以及分散染料在喷射打印墨水和热转称铖像上的应用,展望了分散染料今后的发展方向。     

石蜡相变微胶囊的制备及性能研究

摘 要：以石蜡为芯材,蜜胺树脂(MF)为壁材,采用原位聚合法制备了石蜡相变微胶囊。采用傅里叶红外光谱仪（FT-IR）、扫描电子显微镜（SEM）、激光粒度分析仪和差示扫描量热仪(DSC)对微胶囊的性能和形貌进行了分析和表征,讨论了甲醛与三聚氰胺的摩尔比（F/M）对微胶囊性能和形貌的影响。实验结果表明,F/M摩尔比大于4时,微胶囊之间发生粘结,出现了团聚现象;微胶囊的相变温度略高于芯材石蜡,随着F/M摩尔比增加,微胶囊的相变潜热降低。     

Substitution of Reduction Clearing Step by Ozone Treatment at Disperse Dyeing of Polyester

The effectiveness of ozone treatment for the afterclearing of disperse dyed poly (ethylene terephthalate) (PET) fibers has been examined. Two types of disperse dyed PET samples were selected among commercial mass production range of Akbaslar textile mill. The reduction clearing procedure applied during mass production was taken as the reference reduction clearing treatment; these reference samples were taken after dyeing and reduction clearing processes at the mill. Samples of disperse dyed PET were also taken before reduction clearing in order apply ozone treatment in the laboratory as the tested afterclearing method. Color and wash-fastness properties of the reduction cleared and ozone treated fabric samples were compared and reported. Results indicated acceptable color and wash-fastness results comparable to those of reduction cleared samples for ozone treated samples. The success of ozone treatment for the black dyed PET sample at 7.0% depth of shade was especially outstanding. Ozone treatment was applied in cold water without addition of any chemicals for very short treatment times when compared to conventional reduction clearing. Ozone treatment created substantial energy and chemical savings as well as lower environmental impact.     

Soybean Oil and Nonthermal Plasma Pretreatment to Dye Para-Aramid Woven Fabrics with Disperse Dye Using a Glycerol-Based Dye Bath

High-performance para-aramid fibers offer a number of uses as strong, lightweight materials for protective vests, helmets, tires, and other applications. The chemically inert nature of the fibers makes them difficult to dye or durably print by conventional dyeing techniques for textiles, and solution dyeing during production of the fibers can limit the color of para-aramid fabrics to the color of the spun yarn prior to weaving or knitting and thereby limit the practical applications of these textiles as protective outerwear. This study presents a new method developed to improve the dyeing of woven para-aramid fabrics with a disperse dye. Specifically, sequential experimentation proves the beneficial effects of first soaking para-aramid fabrics in soybean oil followed by surface treatment with atmospheric nonthermal plasma and using glycerol as the dispersant and sodium chloride as an electrolyte without the addition of other auxiliary chemicals. Under the optimized treatment conditions of this study, the color strength (K/S value) of dyed para-aramid fabrics increased to 3.89 from 0.35 of the untreated samples as determined from spectral analysis of the sample reflectance in the visible range. Fourier transform infrared spectroscopy analysis revealed that the high content of unsaturated fatty acids in soybean oil and their interaction with reactive species in the ambient nonthermal plasma were the primary factors for improving the color strength of the dyed para-aramid fabrics.     

The wash-off of dyeings using interstitial water: Part 3. Disperse dyes on polyester

Poly(ethylene terephthalate), which had been dyed at 0.5, 1.0 and 2.0% omf depths of shade using three disperse dyes, was reduction cleared using a traditional, four-stage process that comprised two water rinses at 40 °C, treatment with aq Na₂CO₃/Na₂S₂O₄ at 60 °C and one cold water rinse. A novel, two-stage wash-off method was also employed that consisted of treatment with damp nylon beads and surfactant at 70 °C and one cold water rinse. In terms of fastness to repeated washing at 60 °C and colorimetric characteristics, the traditional, four-stage reduction clearing treatment using aq., alkaline Na₂S₂O₄ could be replaced by the two-stage, bead wash-off with detergent at 70 °C. As the detergent-based, bead wash-off process used lower amounts of water than reduction clearing and did not employ sodium dithionite, it avoided the environmentally unacceptable generation of aromatic amines in the case of the reduction clearing of azo dyes. Calculations indicated that considerably less heat energy was consumed in bead wash-off than reduction clearing not only because two, rather than four stages were involved but also since the bead process used only a 2:1 water:fibre ratio rather than the 20:1 liquor ratio employed in the reduction clear process; also, the much lower specific heat capacity of nylon than water meant that much less heat was required to heat the beads. The beads adsorbed vagrant disperse dye during wash-off, thereby offering the potential of a lower effluent load compared to a traditional reduction clearing treatment for disperse dyes on polyester.     

原位聚合制备液体石蜡微胶囊及表征

以液体石蜡为囊芯,密胺树脂为高分子囊壁材料,用原位聚合法成功制备了密胺树脂石蜡微胶囊.利用激光粒径分布仪、光学显微镜、微机差热天平和傅立叶变换红外光谱仪分别研究了微胶囊的粒径分布、表面形态、热性能和化学结构.讨论了三聚氰胺与甲醛配比、乳化剂用量以及芯材与壁材的投料质量比对微胶囊制备工艺的影响.结果表明:所得微胶囊的平均...     

染料修饰电极的研究进展

染料修饰电极因其电化学响应大,稳定性好且制备简单,引起了人们广泛的研究兴趣,发展非常迅速。本文介绍了近年来染料修饰电极的制备及其应用情况,并对染料修饰电极的发展趋势作了展望。